Merge tag 'vfs-6.18-rc1.rust' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs rust updates from Christian Brauner:
 "This contains a few minor vfs rust changes:

   - Add the pid namespace Rust wrappers to the correct MAINTAINERS
     entry

   - Use to_result() in the Rust file error handling code

   - Update imports for fs and pid_namespce Rust wrappers"

* tag 'vfs-6.18-rc1.rust' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  rust: file: use to_result for error handling
  pid: add Rust files to MAINTAINERS
  rust: fs: update ARef and AlwaysRefCounted imports from sync::aref
  rust: pid_namespace: update AlwaysRefCounted imports from sync::aref

Author: torvalds

MAINTAINERS

@@ -19863,6 +19863,7 @@ M:	Christian Brauner <christian@brauner.io>
 L:	linux-kernel@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git
+F:	rust/kernel/pid_namespace.rs
 F:	samples/pidfd/
 F:	tools/testing/selftests/clone3/
 F:	tools/testing/selftests/pid_namespace/

rust/kernel/fs/file.rs

@@ -10,8 +10,9 @@
 use crate::{
     bindings,
     cred::Credential,
-    error::{code::*, Error, Result},
-    types::{ARef, AlwaysRefCounted, NotThreadSafe, Opaque},
+    error::{code::*, to_result, Error, Result},
+    sync::aref::{ARef, AlwaysRefCounted},
+    types::{NotThreadSafe, Opaque},
 };
 use core::ptr;
 
@@ -398,9 +399,8 @@ impl FileDescriptorReservation {
     pub fn get_unused_fd_flags(flags: u32) -> Result<Self> {
         // SAFETY: FFI call, there are no safety requirements on `flags`.
         let fd: i32 = unsafe { bindings::get_unused_fd_flags(flags) };
-        if fd < 0 {
-            return Err(Error::from_errno(fd));
-        }
+        to_result(fd)?;
+
         Ok(Self {
             fd: fd as u32,
             _not_send: NotThreadSafe,

rust/kernel/pid_namespace.rs

@@ -7,10 +7,7 @@
 //! C header: [`include/linux/pid_namespace.h`](srctree/include/linux/pid_namespace.h) and
 //! [`include/linux/pid.h`](srctree/include/linux/pid.h)
 
-use crate::{
-    bindings,
-    types::{AlwaysRefCounted, Opaque},
-};
+use crate::{bindings, sync::aref::AlwaysRefCounted, types::Opaque};
 use core::ptr;
 
 /// Wraps the kernel's `struct pid_namespace`. Thread safe.